Toolsle
A free online tools hub at toolsle.com — text utilities, converters, calculators, dev helpers, and more. No signup required.
Text Tools
View all (13)Strikethrough Text Generator
Generate crossed-out strikethrough text using Unicode. Copy and paste anywhere — works on all social media and messaging apps.
Cursive Text Generator
Convert text to cursive, bold cursive, gothic, and other fancy Unicode styles. Copy and paste anywhere — Instagram, Twitter, TikTok, Discord and more.
Upside Down Text Generator
Flip your message using upside-down Unicode characters for puzzles, jokes, or eye-catching headlines.
Small Text Generator
Shrink your text with superscript and subscript Unicode styles for compact labels and social flair.
Zalgo Text Generator
Stack combining characters to create glitchy “Zalgo” text for memes and stylized horror aesthetics.
Case Converter
Switch between uppercase, lowercase, title case, and sentence case instantly for drafts and data cleanup.
Sentence Counter
Count sentences, words, and characters in pasted text to hit length targets for essays and marketing.
Word Counter
Count words, characters, sentences, paragraphs, and reading time instantly. Also shows keyword density and most frequent words.
Text Repeater
Repeat a phrase or block of text a set number of times for testing layouts, spam jokes, or filler data.
Reverse Text Generator
Mirror the order of characters or words to decode puzzles, create palindrome ideas, or obfuscate snippets.
Pig Latin Translator
Translate English to Pig Latin and back—handy for word games, teaching phonics, or playful messaging.
Lorem Ipsum Generator
Generate lorem ipsum placeholder text by paragraphs, sentences, words, or characters. Classic, random Latin, or Cicero original. HTML output option.
Random Word Generator
Draw random words from curated lists or custom input for writing prompts, games, and brainstorming sessions.
Converters
View all (16)Morse Code Translator
Instantly translate text to Morse code or Morse code to text. Free, real-time, works both ways.
Wingdings Translator
Map between readable text and Wingdings-style symbol fonts for decoding legacy documents and puzzles.
Binary to Text Converter
Convert binary code (8-bit bytes) to readable text instantly. Paste 0s and 1s and decode in real time — free in your browser.
Text to Binary
Turn any string into its binary representation to inspect encodings or share low-level puzzles.
Hex to Decimal
Convert hexadecimal values to base-10 integers for color math, memory addresses, and networking work.
Decimal to Binary
Express whole numbers in binary form with configurable bit width for teaching and bitwise practice.
Hex to Binary
Translate hex nibbles into binary strings to align with datasheets, masks, and digital logic courses.
Number to Words
Spell out integers and decimals in English for checks, legal wording, invoices, and accessibility.
Celsius to Fahrenheit Converter
Instantly convert Celsius to Fahrenheit or Fahrenheit to Celsius. Free, real-time temperature converter.
Fahrenheit to Celsius
Convert °F to °C quickly when reading US forecasts, oven dials, or legacy equipment manuals.
Miles to Kilometers
Switch between imperial and metric distance for running splits, road trips, and mapping estimates.
Feet to Meters
Convert length measurements for construction, sports field dimensions, and international specs.
Kilograms to Pounds
Translate mass between metric and US customary units for shipping, fitness, and nutrition labels.
MPH to KPH
Convert vehicle speeds and wind reports between miles per hour and kilometers per hour.
Minutes to Hours
Turn minutes into decimal or clock-style hours for payroll, billing, and study session logs.
Seconds to Minutes
Convert durations between seconds and minutes (and hours) for media timing and workout intervals.
Calculators
View all (17)Tip Calculator
Calculate how much to tip and split the bill between any number of people. Free and instant.
Age Calculator
Calculate your exact age in years, months, days, hours, and minutes. Find out what day you were born on.
GPA Calculator
Calculate your semester GPA or cumulative GPA instantly using the standard 4.0 grade point scale.
Average Calculator
Calculate the mean, median, and mode of any set of numbers. Also shows sum, count, min, max, and range.
Median Calculator
Sort values and compute the median—even for even-length sets—for statistics and reporting.
Square Root Calculator
Evaluate √x, including perfect squares and irrationals, for geometry, signal processing, and homework.
Scientific Notation Calculator
Normalize very large or small numbers to a × 10ⁿ form for chemistry, physics, and engineering.
Percent Error Calculator
Compare experimental vs theoretical values to quantify accuracy in labs and calibration tasks.
Proportion Calculator
Solve for unknowns in ratios (a/b = c/d) for recipes, scaling blueprints, and similar triangles.
Velocity Calculator
Relate displacement, time, and constant velocity—or derive average speed—from trip segments.
Significant Figures Calculator
Round results to the correct count of sig figs after multiply/divide or add/subtract operations.
Discount Calculator
Calculate the sale price after a discount, find the discount percentage, or reverse-calculate the original price. Free and instant.
Percentage Calculator
Calculate percentages, percentage change, and percentage difference instantly. Four calculation modes in one free tool.
Markup Calculator
Compute selling price, cost, or markup percentage for retail pricing and margin planning.
Overtime Calculator
Estimate gross pay with regular and overtime hourly rates based on hours worked in a week.
Sales Tax Calculator
Add or remove sales tax from any price. Includes all 50 US state tax rates. Free and instant.
Syllable Counter
Estimate syllables per word or line for poetry, readability scoring, and speech pacing.
Dev Tools
View all (15)UUID Generator
Generate v1 and v4 UUIDs instantly. Bulk generate up to 100 UUIDs, validate existing UUIDs, and download results as a text file.
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes from text or files. Verify file integrity with hash comparison.
JSON Formatter
Format, validate, minify, and sort JSON instantly. Syntax highlighting, tree view, and error detection with line numbers.
Markdown Editor
Write and preview Markdown side by side. Export to HTML or .md file. Auto-saves your work. Full formatting toolbar included.
HTML Formatter
Format, minify, and preview HTML in your browser — tidy tags and inspect structure for cleaner markup.
URL Encoder/Decoder
Encode URLs and query parameters with percent encoding or decode encoded URLs back to plain text. Also parses URL components.
Base64 Encoder/Decoder
Encode text and files to Base64 or decode Base64 back to text and files. Supports Unicode, URL-safe Base64, and file encoding.
Password Generator
Generate strong random passwords and secure passphrases instantly. Choose length, character types, and symbols. Runs entirely in your browser.
Username Generator
Generate memorable username ideas for games, forums, and social profiles — coming soon with themes and length controls.
Robots.txt Generator
Build a robots.txt with allow/disallow rules, crawl delays, and sitemap hints for SEO control.
Meta Tag Generator
Assemble Open Graph, Twitter Card, and classic meta tags for previews and search snippets.
Random Letter Generator
Draw random letters with optional alphabet filters for games, sampling, and test fixtures.
Random Password Generator
Create strong random passwords with adjustable length and character sets for accounts and API keys.
Number Sorter
Paste a list of numbers and sort ascending or descending—useful for datasets and quick QA.
Screen Resolution Checker
Instantly check your screen resolution, viewport size, device pixel ratio, and browser dimensions. Updates live when you resize.
Design Tools
View all (4)Image Resizer
Resize and compress images by width, height, or scale for web and design handoffs. Interactive tool coming soon.
Aspect Ratio Calculator
Compute dimensions for common aspect ratios (16:9, 4:3, etc.) for layouts and video. Interactive tool coming soon.
CSS Gradient Generator
Build linear and radial CSS gradients with live preview and copy-paste code. Interactive tool coming soon.
Color Picker
Pick colors visually and get HEX, RGB, HSL, HSV, and CMYK values. Includes tints, shades, harmonies, WCAG contrast checker, and palette saving.
Science
View all (2)Productivity
View all (6)Coin Flip
Flip a virtual coin for quick 50/50 decisions — heads or tails with instant results.
Dice Roller
Roll polyhedral dice for tabletop RPGs and board games — d4 through d100 with totals and history.
Random Number Generator
Generate random numbers in any range, roll dice, or flip a coin. Single numbers, multiple numbers, and dice rolling all in one free tool.
Pomodoro Timer
Stay focused with the Pomodoro Technique. 25-minute work sessions with scheduled breaks, task tracking, sound notifications, and session history.
Stopwatch Timer
Free online stopwatch with lap splits, hundredths display, Copy Laps, and keyboard shortcuts. Uses performance.now() for timing.
Countdown Timer
Count down with presets, color progress bar, Web Audio alarm, optional notifications, and up to three simultaneous timers. Saves last duration locally.